The results of descriptive analysis of the data students'
mathematical communication skills (MCS) based on learning
approaches are presented in Table 2.
Table 2 shows that students’ MCS increased after under CCTL
and CVTL. The increase of students’ MCS under CCTL is greater
than that of students under CVTL. Before the treatment under
CCTL approach, the MCS students is 18.047, but after the
treatment, increase by 35.6% to 47.266. On the other hand, MCS
of students who were taught only under conventional technique
increased by 14.4%. Based on Hake’s category (1999), the
students’ MCS under CCTL is in the medium category, while the
students’ MCS under conventional technique is in low category.
The result of significance test of the two different increases in the
students’ MCS is presented in Table 3